Here's the difference between the two packages:
TRD Off-Road Package (OC) -- SR5 Package #2 plus off-road tuned suspension with Bilstein® shocks, 16-in. alloy wheels with P265/70R16 BFGoodrich® Rugged Trail T/A tires, locking rear differential, engine skidplate and fuel tank protector, front tow hook, 115V/400-watt deck mounted power outlet, multi-function overhead console with compass and temperature gauge, sport seats with sport fabric and driver's lumbar support, and TRD Off-Road graphics (V6 models)
TRD Sport Package #1 (PY) -- Sport suspension with Bilstein® shocks, 17-in. alloy wheels with P265/65R17 tires, limited-slip rear differential, 115V/400-watt deck-mounted power outlet, fog lamps, power windows/door locks/outside mirrors, remote keyless entry system, cruise control, variable intermittent windshield wipers, multi-function overhead console with compass and outside temperature gauge, color-keyed grille surround/bumpers/mirrors/door handles/overfenders, sliding rear window with privacy glass, sport seats with driver’s lumbar support and sport fabric trim, metallic-tone instrument panel trim, leather-wrapped steering wheel and shifter, sun visors with sliding extensions and vanity mirror, hood scoop, and TRD Sport graphics (V6 models)